Microsoft's September Security Update arrived today with four "critical" and nine "important" bulletin items, including a cumulative fix for Internet Explorer.

As is typical with a Microsoft Patch Tuesday featuring an IE fix, experts are strongly suggesting bulletin MS13-069, which addresses 10 privately reported flaws in the Web browser, be the first item applied.

"For mass exploitation purposes, the most problematic issues have to do with Internet Explorer, with working exploits likely being developed in the near future to attack these memory corruption vulnerabilities," commented Kurt Baumgartner, principal security researcher at Kaspersky Lab North America. "These are the sort of things that can happen to anyone online, so all Windows users should address them ASAP." Read more.